US5793758A - Method and system for wireless communication of a datagram - Google Patents
Method and system for wireless communication of a datagram Download PDFInfo
- Publication number
- US5793758A US5793758A US08/223,888 US22388894A US5793758A US 5793758 A US5793758 A US 5793758A US 22388894 A US22388894 A US 22388894A US 5793758 A US5793758 A US 5793758A
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- United States
- Prior art keywords
- datagram
- shape code
- signal
- address
- signal shape
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/16—Code allocation
- H04J13/18—Allocation of orthogonal codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Definitions
- This invention relates generally to data communication within packet-switched networks.
- this invention relates to methods and systems for communicating datagrams across a network having wireless terminals.
- messages are exchanged among users by transmitting a sequence of packets.
- the sending terminal equipment partitions and disassembles a message into a sequence of packets.
- the packets are transmitted across the network.
- the receiving terminal equipment receives and reassembles the packets into the message.
- Packet-switched networks can provide two types of communication service: connection-oriented service and connectionless service.
- connection-oriented service a connection must be established between the sending terminal equipment and the receiving terminal equipment before communication between the terminals can occur.
- the path to be traversed through the network must be established during a call set-up procedure.
- connectionless service users may transmit individually addressed packets without performing a call set-up procedure.
- the individually addressed packets are commonly referred to as datagrams.
- the connectionless service avoids the call set-up procedure, complete address information is required to be included with each datagram.
- wireless data communication networks are based on radio, satellite or microwave technologies.
- a wireless data communication network is a cellular telephone network.
- the second network provides connectionless service employing datagrams.
- the linking of these two networks, the first connection-oriented mobile network and the second connectionless network, require the overhead from both types of services. Not only does a call set-up procedure need to be executed, but also each datagram must contain complete address information.
- the present invention described and disclosed herein comprises a method and system for communicating a datagram in a wireless communication network.
- a first method for communicating a datagram in a wireless communication network.
- the wireless communication network includes a transmitter for sending a message and a receiver for receiving a message.
- the method begins with the step of identifying a transmitting signal shape code.
- the signal shaped code is a CDMA user code.
- the method includes the step of transmitting from the transmitter a signal representing a datagram. This step is performed based on the transmitting signal shape code.
- the method further includes the steps of identifying a receiving signal shape code and receiving the transmitted signal at the receiver.
- the method continues with the step of filtering the received signal based on the receiving signal shape code.
- the method concludes with the step of processing the filtered signal.
- FIG. 1 is a functional schematic diagram illustrating the hardware of a prior art wireless communication service
- FIG. 2 is a functional schematic diagram illustrating the hardware of a wireless communication service in accordance with the present invention
- FIG. 3 is a flowchart illustrating the method steps of the present invention.
- FIG. 4 is a block diagram illustrating a representative physical layer datagram header
- FIG. 5 is a block diagram illustrating a first wireless network datagram header used in accordance with the present invention.
- FIG. 6 is a block diagram illustrating a second wireless network datagram header used in accordance with the present invention.
- FIG. 1 illustrates the hardware of a typical prior art wireless communication network.
- the illustrated wireless communication network employs only connection-oriented service.
- a user employs personal computer 110 to communicate through the wireless network with a second network.
- Personal computer 110 includes programming to communicate with the second network using a standard protocol such as internet protocol (IP).
- IP internet protocol
- IP is currently the industry standard, other protocols have been proposed for replacing IP.
- Personal computer 110 is connected to remote transceiver 111 for communication through the wireless data communication network.
- remote transceiver 111 is shown external to personal computer 110, an internally installed transceiver is an acceptable alternative and is illustrated as wireless terminal 113.
- Wireless terminal 113 communicates with radio port 112 using CDMA radio signals.
- the CDMA radio signals represent data communicated to and from wireless terminal 113.
- Radio port 112 is connected to radio port controller 114 which includes control logic for operating radio port 112.
- Radio port controller controls the CDMA signal shaping which permits communication between radio port 112 and wireless terminal 113.
- Radio port controller 114 is connected to telephone switch 116 for communication across a public switched telephone network.
- telephone switch 116 is connected to IP router 118.
- IP router 118 is responsible for routing data between the public switched telephone network and the second network with which wireless terminal 113 is communicating. In order for wireless terminal 113 to communicate with the second network, a conversion must occur between the connection oriented service of the first network and the connectionless service of the second network.
- FIG. 2 illustrates the hardware of a wireless communication service which supports CDMA datagrams in accordance with the present invention.
- the illustrated wireless communication network not only employs connection-oriented service for communication with a public switched telephone company, but also connectionless service for communication with IP and other connectionless networks.
- a mobile computing user employs personal computer 110 to communicate with a distant IP compatible network.
- Remote transceiver 111 which could be part of wireless terminal 113, and radio port 112 act as the nodes of a CDMA radio communication link.
- radio port controller 210 which is connected to radio port 112, telephone switch 116 and IP router 118.
- Control logic included in radio port controller 210 directs communication between radio port 112 and either switch 116 or IP router 118 depending on the requirements of wireless terminal 113. For example, if a signal representing a datagram is sent from wireless terminal 113 addressed to the second network, the control logic of radio port controller 210 directs the signal to IP router 118. If, however, the radio port controller 210 receives a signal requesting a direct connection, the control logic directs the received signal to telephone switch 116.
- the communication between radio port 112 and wireless terminal 113 is based on a CDMA user coding scheme currently employed by companies such as Qualcomm and Motorola. Under coding schemes employed by these companies, each user of the wireless network is allocated a distinct 42 bit code. Consequently, this coding scheme can theoretically support 2 42 codes. The number of concurrent users is, of course, limited by the bandwidth and the capacity of the radio communication trunk.
- codes are allocated at transmission time to ensure that they are orthogonal, which increases transmission reliability. While CDMA can also work with semi-orthogonal codes, transmission quality is reduced as orthogonality is reduced. Every distinct code is at least semi-orthogonal with every other code. In this fashion, CDMA allows any entity to transmit at any time as long as they have distinct orthogonal codes.
- Block 310 illustrates the step of identifying a transmitting signal shape code.
- this step includes the step of converting a destination datagram address into a CDMA user code. If the datagram is being sent from wireless terminal 113 to the second network, block 310 includes the step of identifying the CDMA user code associated with wireless terminal 113. Two distinct CDMA codes are used: a first for sending datagrams from wireless terminal 113 and a second for receiving datagrams at wireless terminal 113.
- Block 312 illustrates the step of transmitting from the transmitter a signal representing a datagram.
- Block 312 includes the step of shaping the transmitted signal based on the CDMA user code.
- the CDMA user code is also known as a signal shape code.
- Block 314 shows the step of identifying a receiving signal shape code. If a datagram is being sent from the second network to wireless terminal 113, this step is performed by wireless terminal 113 and includes the step of identifying the CDMA user code associated with wireless terminal 113. If the datagram is being sent from wireless terminal 113 to the second network, this step is performed by radio port 112.
- Block 316 illustrates the step of receiving the transmitted signal at the receiver.
- the received signal is filtered as shown at block 318.
- the step of filtering the received signal is based on the receiving signal shape code. If the transmitting signal shape code and the receiving signal shape code are compatible, the signal is passed on for processing.
- the step of processing, shown at block 320, is performed by wireless terminal 113 if a datagram originated at the second network.
- the step of processing is performed by radio port controller 210 for all datagrams originating from wireless terminal 113.
- the step of processing includes converting the receiving signal shape code into source address data. This data is inserted into a header associated with the datagram.
- FIG. 4 a representative physical layer datagram header is illustrated which can be used in accordance with the present invention. This header facilitates the transmission of datagrams between IP router 118 and wireless terminal 113.
- the illustrated header includes the following fields: version 410, payload length 412, payload type 414, source address 416 and destination address 418.
- the radio port controller 112 is responsible for directing the packet to the appropriate address.
- the radio port controller 210 must translate the destination address of the header into a destination CDMA user code.
- radio port controller 114 directs radio port 112 to transmit the datagram using the destination CDMA user code.
- wireless terminal 113 includes control logic which translates the source address into a source CDMA user code.
- the datagram is transmitted to radio port 112 using the source CDMA user code.
- FIG. 5 illustrates a first wireless network datagram header which is used when transmitting a datagram from radio port 112 to wireless terminal 113.
- This header requires only the following fields: version 410, payload length 412, payload type 414 and source address 416.
- This header does not require a destination address because the destination of the datagram is mapped into the CDMA user code. Once the destination address is translated into a CDMA user code, the user associated with the CDMA user code will receive the datagram.
- FIG. 6 illustrates a second wireless network datagram header which is used when transmitting a datagram from wireless terminal 113 to radio port 112.
- This header requires most of the information contained in the header of FIG. 4 including the following fields: version 410, payload length 412, payload type 414, and destination address 418.
- This header does not require a source address.
- the source address is obtained by translating the CDMA user code into a source address.
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US08/223,888 US5793758A (en) | 1994-04-06 | 1994-04-06 | Method and system for wireless communication of a datagram |
Applications Claiming Priority (1)
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US08/223,888 US5793758A (en) | 1994-04-06 | 1994-04-06 | Method and system for wireless communication of a datagram |
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US5793758A true US5793758A (en) | 1998-08-11 |
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US08/223,888 Expired - Lifetime US5793758A (en) | 1994-04-06 | 1994-04-06 | Method and system for wireless communication of a datagram |
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000020993A1 (en) * | 1998-10-05 | 2000-04-13 | Motorola Inc. | Method and apparatus for efficiently encoding wireless data packet headers |
US6185623B1 (en) * | 1997-11-07 | 2001-02-06 | International Business Machines Corporation | Method and system for trivial file transfer protocol (TFTP) subnet broadcast |
US6483470B1 (en) | 1999-09-08 | 2002-11-19 | Qwest Communications International, Inc. | Power supply for a light pole mounted wireless antenna |
US20040213218A1 (en) * | 1999-09-08 | 2004-10-28 | Qwest Communications International Inc. | System and method for dynamic distributed communication |
US6831902B1 (en) | 1999-09-08 | 2004-12-14 | Qwest Communications International, Inc. | Routing information packets in a distributed network |
US6847633B1 (en) * | 1999-02-26 | 2005-01-25 | The Directv Group, Inc. | Internet-augmented radio port controller unit (RPCU) of personal acces communications systems (PACS) |
US6963570B1 (en) * | 1997-07-15 | 2005-11-08 | Comsat Corporation | Method and apparatus for adaptive loss-less compression of cell/packet headers |
US20050249244A1 (en) * | 2004-03-10 | 2005-11-10 | Kabushiki Kaisha Toshiba | Packet format |
US7388846B1 (en) | 1999-09-08 | 2008-06-17 | Qwest Communications International Inc. | Cellularized packetized voice and data |
US7561895B1 (en) | 1999-09-08 | 2009-07-14 | Qwest Communications International, Inc. | Reverse sectorization wireless communication |
US8005077B1 (en) | 1999-09-08 | 2011-08-23 | Qwest Communications International Inc. | Distributively routed VDSL and high-speed information packets |
US20180234535A1 (en) * | 2017-02-10 | 2018-08-16 | Mediatek Inc. | Method and apparatus for communication |
US11275703B1 (en) * | 2020-09-17 | 2022-03-15 | Qualcomm Incorporated | Real-time control compliant radio frequency coexistence management bus |
Citations (9)
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US5068916A (en) * | 1990-10-29 | 1991-11-26 | International Business Machines Corporation | Coordination of wireless medium among a plurality of base stations |
US5257257A (en) * | 1991-04-05 | 1993-10-26 | Nokia Mobiltelefoner Ab | Method of controlling the operation of a packet switched CDMA communication network for controlling the operation of transmitters and receivers |
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US5341395A (en) * | 1992-11-24 | 1994-08-23 | At&T Bell Laboratories | Data recovery technique for asynchronous CDMA systems |
US5353300A (en) * | 1993-06-07 | 1994-10-04 | Motorola, Inc. | Communication method for an adaptive direct sequence CDMA communication system |
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-
1994
- 1994-04-06 US US08/223,888 patent/US5793758A/en not_active Expired - Lifetime
Patent Citations (9)
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US5068916A (en) * | 1990-10-29 | 1991-11-26 | International Business Machines Corporation | Coordination of wireless medium among a plurality of base stations |
US5315584A (en) * | 1990-12-19 | 1994-05-24 | France Telecom | System of data transmission by sharing in the time-frequency space with channel organization |
US5257257A (en) * | 1991-04-05 | 1993-10-26 | Nokia Mobiltelefoner Ab | Method of controlling the operation of a packet switched CDMA communication network for controlling the operation of transmitters and receivers |
US5408237A (en) * | 1991-11-08 | 1995-04-18 | Teledesic Corporation | Earth-fixed cell beam management for satellite communication system |
US5410568A (en) * | 1992-01-13 | 1995-04-25 | Interdigital Technology Corporation | CDMA/TDMA spread-spectrum communications system and method |
US5461610A (en) * | 1992-08-31 | 1995-10-24 | At&T Ipm Corp. | Precoding of signature sequences for CDMA systems |
US5341395A (en) * | 1992-11-24 | 1994-08-23 | At&T Bell Laboratories | Data recovery technique for asynchronous CDMA systems |
US5406550A (en) * | 1993-03-17 | 1995-04-11 | Roke Manor Research Limited | Communication systems |
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Non-Patent Citations (2)
Title |
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Handouts received in three day class entitled "Wireless Information Networks" by David Goodman of Rutgers University, presented at U S west on Mar. 17-Mar. 19, 1993. |
Handouts received in three day class entitled Wireless Information Networks by David Goodman of Rutgers University, presented at U S west on Mar. 17 Mar. 19, 1993. * |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6963570B1 (en) * | 1997-07-15 | 2005-11-08 | Comsat Corporation | Method and apparatus for adaptive loss-less compression of cell/packet headers |
US6185623B1 (en) * | 1997-11-07 | 2001-02-06 | International Business Machines Corporation | Method and system for trivial file transfer protocol (TFTP) subnet broadcast |
WO2000020993A1 (en) * | 1998-10-05 | 2000-04-13 | Motorola Inc. | Method and apparatus for efficiently encoding wireless data packet headers |
US6847633B1 (en) * | 1999-02-26 | 2005-01-25 | The Directv Group, Inc. | Internet-augmented radio port controller unit (RPCU) of personal acces communications systems (PACS) |
US6987769B1 (en) | 1999-09-08 | 2006-01-17 | Qwest Communications International Inc. | System and method for dynamic distributed communication |
US7561895B1 (en) | 1999-09-08 | 2009-07-14 | Qwest Communications International, Inc. | Reverse sectorization wireless communication |
US20040213218A1 (en) * | 1999-09-08 | 2004-10-28 | Qwest Communications International Inc. | System and method for dynamic distributed communication |
US8457027B2 (en) | 1999-09-08 | 2013-06-04 | Qwest Communications International Inc. | System and method for dynamic distributed communication |
US6483470B1 (en) | 1999-09-08 | 2002-11-19 | Qwest Communications International, Inc. | Power supply for a light pole mounted wireless antenna |
US7388846B1 (en) | 1999-09-08 | 2008-06-17 | Qwest Communications International Inc. | Cellularized packetized voice and data |
US7561540B2 (en) | 1999-09-08 | 2009-07-14 | Qwest Communications International, Inc. | System and method for dynamic distributed communication |
US6831902B1 (en) | 1999-09-08 | 2004-12-14 | Qwest Communications International, Inc. | Routing information packets in a distributed network |
US7688801B2 (en) | 1999-09-08 | 2010-03-30 | Qwest Communications International Inc. | Routing information packets in a distributed network |
US8005077B1 (en) | 1999-09-08 | 2011-08-23 | Qwest Communications International Inc. | Distributively routed VDSL and high-speed information packets |
US8098605B2 (en) | 1999-09-08 | 2012-01-17 | Qwest Communications International Inc. | System and method for dynamic distributed communication |
US20050249244A1 (en) * | 2004-03-10 | 2005-11-10 | Kabushiki Kaisha Toshiba | Packet format |
US20180234535A1 (en) * | 2017-02-10 | 2018-08-16 | Mediatek Inc. | Method and apparatus for communication |
US11275703B1 (en) * | 2020-09-17 | 2022-03-15 | Qualcomm Incorporated | Real-time control compliant radio frequency coexistence management bus |
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